Connecting device for shafts and arms.



;N Q. 747,405. PATENTED DEC. 22, 1903;

' s. FRAZIER.

CONNECTING DEVICE FOR SHAFTS AND ARMS.

AI PLIOATION FILED APR. 21, 1903.

UNITED STATES Patented December 22, 1903.

PATENT OFFICE;

CONNECTING DEVlCE FOR SHAFTS AND ARMS.

SPECIFICATION forming part of Letters Patent No. 747,405, datedDecember22, 1903.

Application filed April 21, 1903.

To all whom it may concern:

Be it known that I, SCHUYLER FRAZIER, a citizen of the United States,residing at Argentine, Wyandotte county, Kansas, have in vented certainnewand useful Improvements in Connecting Devices for Shafts and Arms, ofwhich the followingis a specification.

This invention relates to apparatus in which rotating or rocking shaftsare provided with radial arms, and more especially to roastingfnrnaceswhere hollow shafts carry hollow rabble-arms; and the invention consistsin providing the shafts with sockets or recesses and the arms withprojections and lugs adapted to said sockets, with keys for securing theparts in place, as fully set forth hereinafter and illustrated in theaccompanying drawings, in which Figure l is a sectional elevation ofsufficient of a roasting-furnace to'illustrate my invention. Fig. 2 isan enlarged vertical section through the shaft and one of the arms; andFig. 3 is a transverse section on the line 3 3, Fig. 2.

The shaft A, as shown, is the vertical shaft of a roasting-furnace andsupports radial arms B, which constitute the rabbles of such furnace,being carried over the hearths to operate upon the ore in a manner wellunderstood, the'shaft having a central channel or being hollow for thepassage of air and the arms 'B also being hollow, with coinciding ports1 2, permitting the air to pass from the shaft into the arms, the endsof the arms having terminal ports 3, through which the air escapes. Inorder to permit the rabbles 4 to be connected firmly to the shaft, andcspecially to permit them to be connected and detached, which requiresto. be frequently done, and to avoid the necessity of interfering withother operations while this is done, the shaft is provided with sockets00, each of which has at one side a recess y, and each arm has-aprojection 12, with a side lug 13, the projection fitting the socket,except that it is narrower than the latter, and the side lugs fittingthe recess y, the ports 1 and 2 coinoiding when the arm is in saidrecess. To hold the parts in this position, a key 0 is introducedbetween the side edge of the projection of the arm and the adjacent faceof the socket at, thereby preventing any side motion,

Serial No. 153,701. (No model.)

while as the projection fits the recess in other respects there can beno other movement of the arm independently'of the shaft, so that thearms and the shaft are carried together during the rotation of theshaft, and to further insure a firm tight connection between the partswhich will not become loosened under strains the lugs 13 are upon theforward edgesof the projections of the arms, so that as the shaft turnsin the direction of the arrow, Fig.2, the lugs will resist any tendencyof the arm to be thrust out of position. In order to retain the key 0 inplace, any suitable securing device may be employed; but I prefer toprovide each arm'with a perforated lug 4 and to provide each key with apin 5, adapted to the perforation in the lug. When the parts are inplace, the pin 5 fits the perforation in the lug 4 and the key is heldin position, and when it is necessary to remove the arm the key can belifted until its pin is out of the perforation, when the key may beremoved. It will. be evident that a pin upon the lug and a recess in thekey would secure the same result and be the equivalent of theconstruction shown.

It will be seen that the arms may be introduced and withdrawn withoutinclining them from a horizontal position, thus permitting a readywithdrawal and replacing of an arm when necessary without interferencefrom the presence of ore upon the hearth or from other cause.

While the socket may be of any suitable shape, it is preferably taperingto receive the tapering end of the projection 12, thus insuring a tightfit when the arm is in positionand to permit its ready introduction.

While I have shown my invention in connection with the hollow armsconstituting the rabbles of roasting-furnaces, it will be evident thatthe invention described may be used for other purposes where arms haveto be connected to shafts so as to be readily applied and removed.

Without limiting myself to the construction shown, I claim- 1. The shaftA provided with sockets having lateral recesses y, combined with arms Beach having a projection less in width than said socket, and with a lug13 fitted to said recess y, and a key fitting between said projectionand the side of the socket, substantially as set forth.

2. The shaft A provided with sockets having lateral recesses y combinedwith arms B each having a projection less in width than said socket andwith a lug 13 fitted to said recess 1 a key fitting between saidprojection and the side of the socket, and a retaining device forholding the key in place, substantially as set forth.

3. The vertical hollow shaft A having sockets with side recesses,combined with hollow armsB having projections and lugs, and keys betweenthe projections and lugs, with ports affording communication between theshaft and the arms, substantially as set forth.

4. The shaft A provided with sockets having lateral recesses y, combinedwith arms B each having a projection less in width than said socket andwith a lug 13 fitted to said recess y, and a key fitting between saidprojection and the side of the socket, the arms having perforated earsand the keys with pins adapted to the perforations in the ears,substantially as set forth.

'5. The combination with a furnace, of a hollow shaft, hollow armsconstituting rabbles extending from said shaft and having projectionswith lugs extending into corresponding sockets in the shaft, anddetachable keys fitting the sockets between the arms and shaft,substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SCHUYLER FRAZIER.

Witnesses:

P. J. GILPIN, W. S. HALL.

